Kidder, Frank E. (Frank Eugene), 1859-1905, Nolan, Thomas, 1857-1926 · New York : W.T. Comstock · leaf 357
ch secures the dooris generally made quite heavywhere it projects beyond the face plate, but is thinned down insidethe lock so as to be as light as possible and to give space for thelevers. The general shape of the common cast bolt is shown in Fig.368. The notch A is where the key catches, the post… … Fig. 369.—Dead Bolt and Levers of the Yalr Vulcan Lock. FINISHED HARDWARE—LOCKS. 355 In all the best grades of cast locks the bolt is of brass or bronze,an iron bolt being too easily broken. 215. Levers.—The levers or tumblers, the terms being used syn-onymously, are flat pieces of iron, steel or…
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